Originally Posted by Rakuflames
Errrr.....let us know how it turns out
FWIW I would start with a small area and not flood the deck
with Gas / Petrol - as will likely yellow the Gelcoat, albeit I am not sure of the timescale for that (instant? or a week? / more?). Clean up with soapy water
(Washing powder (for Clothes) is my favourite (and cheap!) degreaser that also breaks down petrol and diesel
from spills....again, don't start by spreading it all down the deck!
Then, if still yellowing / staining can start with gelcoat rubbing compound (or automotive T-Cut
) - but if that don't work then it's time for the Sandpaper (wet 'n' dry) - used wet!........start with something like 800 grit and then work your way down the numbers until you start shifting gelcoat / stain (dunno how thick your gelcoat is, but on the (older) boats I have done this on can be surprisingly aggressive with the hand sanding
(not a belt sander though!) and seem to need to be to shift any gelcoat (it's tuff stuff!)........and then work your way back up to 800 grit (or higher) and then finish with rubbing compound and polish - downside is that will likely look a bit better than rest of deck
, that difference will fade in time.